Pubic Lice

Pubic lice are an infestation caused by small parasitic insects that can live in the pubic area and sometimes in coarse hair-bearing areas such as the armpits, chest, beard, mustache, eyebrows, or eyelashes. They are also commonly known as “crabs.” In most cases they are noticed because of intense itching; however, they do not merely cause itching, but can also spread to others through close contact. Treatment is possible, but selecting the correct product and implementing simultaneous hygiene measures are important. ^[1][3][4]

Having pubic lice is not the same as being unclean. These parasites do not fly or jump; they spread by clinging to hair and through close contact. The most common route of transmission is sexual contact, although they may rarely spread through shared towels, bedding, or clothing. Detection in the eyebrows or eyelashes of children requires special attention, because specialist evaluation is important, including assessment of the possibility of sexual contact. ^[1][2][3]

What are the symptoms of pubic lice?

The most common symptom is pronounced itching in the pubic area. The itching is often more noticeable at night, because the parasites feed on blood and irritate the skin. Very small eggs attached to the hair shafts, known as nits, may sometimes be seen with the naked eye or with magnification. Scratching may cause redness, small crusted areas, or irritation of the skin. Some people may also notice tiny dark specks in their underwear or small bluish-gray spots on the skin. ^[1][3][4]

Pubic lice do not have to remain confined to the pubic area. In more extensive cases, they may involve the inner thighs, lower abdomen, armpits, chest hair, beard and mustache, and more rarely the eyebrows and eyelashes. When the area around the eyes is affected, redness, stinging, crusting, and eye discomfort may occur. In such cases, medical evaluation is needed rather than self-treating with over-the-counter products, especially for eye and skin safety. ^[2][3][4]

How are they transmitted, and who is at increased risk?

Pubic lice are most commonly transmitted through close skin-to-skin contact, particularly during sexual contact. They are not transmitted by animals; household pets are not a source of this infestation. Crowded living conditions or shared textiles may increase the risk in some situations, but not every complaint of itching indicates pubic lice. Fungal infections, eczema, allergic reactions, and other sexually transmitted infections may cause similar symptoms. ^[1][3]

When assessing risk, it is important to ask about a recent new sexual partner, a partner with similar symptoms, or sharing the same bed or textile items. Even so, a person may develop this infestation while being in a monogamous relationship, so stigmatizing language should be avoided. What matters is not delaying the diagnosis and not overlooking concurrent evaluation of close contacts. Even if one person is treated, reinfestation may occur if close contacts are not assessed. ^[1][2][3]

How is it diagnosed?

Diagnosis is often made during a clinical examination when a live louse or nits attached to the base of the hair are seen. Sometimes a description of itching alone is not enough to establish the diagnosis, because many conditions can cause similar symptoms. A healthcare professional may, if necessary, examine the area with a magnifying device or tools similar to dermoscopy. If the eyebrows or eyelashes are involved, evaluation becomes even more important for differential diagnosis and safe treatment planning. ^[2][3][4]

In people with pubic lice, screening for other sexually transmitted infections may also be considered. This is particularly relevant in those with a history of a new or multiple sexual partners. Although pubic lice are a treatable infestation, overlooking another coexisting infection may lead to more important problems in the long term. For this reason, assessment should not be limited to the goal of merely “stopping the itching.” ^[2][3]

How is it treated?

The main treatment approach is the correct use of topical anti-lice products recommended by a healthcare professional, with repeat treatment at the recommended time when necessary. The active ingredient used may vary according to age, pregnancy, breastfeeding status, skin sensitivity, and the area involved. Especially in cases involving the eye area, children, or those that do not improve despite treatment, physician evaluation is preferred over self-experimentation with products. Treatment is not only about killing the parasites, but also about removing the nits and preventing reinfestation. ^[1][2][3]

Underwear, towels, bed linens, and clothes used during the same period should be washed appropriately. People with whom there has been recent sexual contact should also be evaluated and treated if necessary. Avoiding close sexual contact during treatment is important for breaking the cycle of transmission. Shaving alone is not a treatment, because it may not completely eliminate lice and nits. It may also irritate the skin and worsen the situation. ^[1][2][4]

Possible problems and when to see a doctor

Pubic lice generally do not cause severe systemic illness, but secondary skin infections may develop because of intense itching and scratching. A doctor should be consulted if the itching does not improve, if widespread redness or an inflamed appearance develops on the skin, if the eyelashes and area around the eyes become involved, or if the problem does not resolve despite over-the-counter treatment. New lesions after treatment may suggest incorrect use, reinfestation, or a different diagnosis. ^[1][2][4]

Fever, widespread skin infection, marked eye pain, vision changes, or eyebrow/eyelash involvement in a child require urgent and careful evaluation. This content does not replace diagnosis or treatment; individual medical assessment is particularly important during pregnancy, in children, in eye involvement, and in recurrent cases. With correct treatment and appropriate hygiene measures, the infestation can be controlled in most cases. ^[1][2][3]

Why is preventing reinfestation after treatment so important?

Symptoms may improve quickly after pubic lice are treated, but reinfestation can occur if environmental cleaning and close-contact management are incomplete. For this reason, it is not enough to focus only on the itching resolving. Correct application of the product according to instructions, not skipping the repeat dose when needed, and evaluating recent sexual contacts are all important. Otherwise, a person may think “the treatment did not work,” when the problem is sometimes renewed exposure. ^[1][2][3]

FAQ

Are pubic lice transmitted only sexually?
Sexual contact is the most common route of transmission, but they may rarely spread through shared towels, bed linens, or clothing. ^[1][3]

Does having pubic lice mean someone is dirty?
No. Pubic lice are not directly synonymous with poor personal hygiene. They are a parasitic infestation transmitted through close contact. ^[1][3]

Is shaving alone enough?
No. Shaving alone is not a reliable treatment. Appropriate anti-lice products and environmental hygiene measures are needed. ^[1][2]

Should the partner be treated as well?
In most cases, yes. Evaluating recent partners helps reduce reinfestation. ^[2][3]

What should be done if pubic lice are found in the eyelashes?
In that situation, self-treatment may not be appropriate. Involvement of the eye area requires medical evaluation. ^[2][4]